Machine for preparing lasted boots and shoes for the sewing operation.



F. L. MAOKENZIE.

MACHINE FOR PREPARING LASTED BOOTS AND SHOES FOR THE SEWING OPERATION.

APPLICATION FILED AUG. 5, 1912.

2 SHEETS-SHEET 1.

Patented Jan. 26, 1915.

THE NORRIS PETERS CO" PHOTO-LITHO.. WASHINGI'DN. D. C

F. L. MACKENZIE.

MACHINE FOR PREPARING LASTED BOOTS AND SHOES FOR THE SEWING OPERATION.

APPLICATION TILED AUG. 5, 1912.

L126,244. Patented Jan. 26, 1915.

2 SHEETS-SHEET 2.

THE NORRIS PETERS c0 PHOTOVLITHOH WASHING ION, 1:. c.

UNTTEU STATlES QTNT FFTCE.

FIRED L. MACKENZIE, OF BEVERLY. MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MACHINE FOR PREPARING LASTED BOOTS AND SHOES FOR THE SEWING OPERATION.

Specification of Letters Patent.

Patented Jan. 26, 1915.

Application filed August 5, 1912. Serial No. 713,407.

To all whom it may concern Be it known that I, FRED L. MACKENZIE, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Machines for Preparing Lasted Boots and Shoes for the Sewing Operation; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to machines for preparing lasted boots and shoes for the sewing operation, and more particularly to machines of this type which remove the lasting tacks from the path of the needle of the sewing machine.

It is customary in the manufacture of welt shoes to remove from the shoe preparatory to the welt sewing operation, all of the side tacks except a few which remain in the shoe to retain the upper in its lasted position. These few remaining tacks, however, cause more or less interference with the needle of the sewing machine, and it is desirable to remove them from the path of the needle without impairing their holding capacity. If the tacks which remain in the shoe are bent in a lateral direction toward the inside of the shoe, they are removed from the path of the welting needle without loosening them in the shoe to such an extent that their ability to retain the upper in its lasted position is impaired.

The object of the present invention is to provide a machine of the class described having improved mechanism for bending the tacks inwardly in a lateral direction to remove them from the path of the needle.

With this object in view the various features of the invention consist in certain novel features of construction, combinations and arrangements of parts hereinafter described and claimed, the advantages of which will be obvious to those skilled in the art from the following description.

In the accompanying drawings illustrating the preferred form of the invention;

Figure 1 represents a side elevation of a machine embodying the several features of the invention in their preferred form; and Fig. 2 is a view similar to Fig. 1, illustrating the mechanism in a different relative position. Fig. 3 is a detail showing the tack bending hammer and cooperating downhold, and illustrating the manner in which the hammer bends the tack.

The illustrated embodiment of the machine is shown in connection with a tack pulling machine of the type shown and described in the U. S. Patent to MacKenzie No. 1,013,944, dated January 9, 1912. This machine is provided with a reciprocating tack pulling claw 1 rigidly supported on the outer free end of a jaw supporting arm 2, which is pivotally supported between its ends by a depending link 4, and has its opposite end connected to a crank shaft 5. The crank shaft 5 is continuously rotated from a drive shaft 6 through a suitable belt connection 7. The link 4 5S fulcrumed at 8 upon a fixed portion of the machine frame, and when the crank shaft 5 is rotated the tack pulling jaw 1 is moved in a substantially elliptical path. Cooperating with the jaw 1 is a stationary jaw 10 secured to the machine frame 11 and arranged to engage and support the tack against the thrust of the movable jaw 1. The tack is properly presented to the cooperating jaws and the shoe is held during the tack pulling operation by a guard 12 secured to the machine frame and extending into close proximity to the stationary jaw 10. This mechanism is the same as that disclosed in the patent above referred to, and in consequence has been only briefly described herein.

Although, as stated previously, the majority of side tacks are removed prior to the sewing operation, yet some of the tacks, and more particularly the anchor tacks are left in the shoe to aid in retaining the upper in its lasted position during the sewing operation. These remaining tacks are often engaged by the needle during the sewing operation, causing a breakage of the needle and consequent delay in the sewing. In the present invention mechanism is provided for removing these tacks from the path of the needle by bending them in a lateral direction inwardly toward the channel of the shoe without substantially lifting them in the last. In the simplest and most efficient form of the invention which has yet been devised, a laterally moving bending instrument engages the side of the tack, bending itinwardly, while the tack issecured in the shoe.

In order to facilitate the bending'opera-' tion and support the shoe against the thrust of the bending instrument, a fixed guide or abutment is provided which rests against the opposite side of the tack where it enters the shoe. Inthe drawings,a bending ha-m' mer is indicated at15" and is secured in the lower end of an arm- 1-6 fulcrumed at 17 in a bracket 18 secured to the machine frame. The hammer 15 is locked in the arm 16 in the usual manner by a locking bolt 20; The shoe is supported against the thrust of the hammer by a guide or abutment 22 which is adjustably secured to a supporting arm23 as shown clearly in Fig. 3. The arm 23 is mounted upon the bracket 18 and has provision for adjustment relative thereto through the bolt and slot connection indicated at 24. k M j I In the present invention the bending hammer is continuously actuatedand is conveniently connected to the tack pulling mechanism to be operated thereby; The movement of the bending hammer is retarded when the hammer is retracted in an inoperative. position and is accelerated upon approaching a tack, thus providing ample time for the positioning of the tack to be operated upon and causing the tack to be bent with a quick percussive blow. T 0 this end the arm 16' has an integral arm 26 eX- tending laterally therefrom and isconnected at. its outer end to the jaw supporting. arm 2 by means of the link 27. M i

It will be obvious to those skilled in the art. upon an examination of the drawings that the arrangement of the actuating mechanism is such that the movement of the hammer as accelerated when approaching a tack and is retarded when in a retracted position. When the tack pulling mechanism is set into operation, an oscillatory movement is imparted to the arm 16 about the fulcrum 17 causing the hammer 15 to reciprocate toward and from the abutment 22. The tack to be operated upon is conveniently positioned with the working edge of the abutment resting against the inside of the tack at the point where it enters the shoe, and the hammer its tack engaging movement then'strikes the oppositeside' ofthetack at-its= upper portion and positively bends the tack inwardly toward the channel of the shoe. With this construction and arrangement of parts an extremely simple and eflicient mechanism is provided operating in conjunction with the tack pulling mechanism to bend over those tacks which remain in the shoe.

It is to be understood that the invention is not limited in its scope to the employment of the improved tack bending mechanism with a tack pulling mechanism of the type described, nor is it limited to the employmentof the tack bending mechanism with any type of tack pulling mechanism, as the bending mechanism, if so desired, may be used independently or with some other type of machine.

While it is preferred to employ the specific construction of parts shown and described, it will be understoodthat this construction and arrangement is not essential except so far as specified in the claims, and may be changed or modified without departing from the broader features of the invention.

Having described the/invention, what is claimed is: j

1. A machine of the class described having, in combination, a bending instrument for engaging with the side of a tack, mech anism for imparting a lateral movement to the bending instrument to cause the tack to be bent inwardly toward the channel of the shoe to remove it from. the path of the needle, and a positioning device for causing the bending instrument to engage and bend the tack without lifting it in the last.

2. A machine of the class described having, in combination, a tack engaging hammer, mechanism for reciprocating the hammer laterally to engage and bend the tack inwardly toward the channel of the shoe, and a positioning device to cause the hammer to engage and bend the tack without lifting it in the last.

3. A machine of the class described having, in combination, a tack engaging hammer, an arm supporting the hammer, means for oscillating the arm to move the hammer toward and from the tack, and bend the tack inwardly toward the channel of the shoe, and a positioning device for causing the hammer to engage and bend the tack without lifting it in the shoe.

A. A machine of the class described having, in. combination, a tack engaging hammer, a movable tack pulling jaw, mechanism for actuating the jaw, connections between the tack pulling mechanism and the hammer for operating the hammer to bend a ing, in combination, a tack engaging hamport the tack against the thrust of the bendmer, mechanlsm for actuating the hammer 111g hammer.

in a lateral direction to engage a tack and FRED L. MACKENZIE. bend it inwardly toward the channel of the Witnesses:

shoe, and an abutment arranged to engage BURTON W'. CARY,

With the opposite side of the tack and sup- MABEL ACKROYD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

